Pianoforte action



Oct. 21, 1930.

E. E. ADAMS 1,779,303

PIANOFORTE ACTION Filed March 2l, 1929 Patented Oct. 21, 1930 UNITED STATES Linnea ERNEST EDWIN ADAMS, OF AUCKLAND, N

PIANOFORTE ACTION EW ZEALAND AppIication led March 21, 1929, Serial No. 343,959, and in New Zealand October 16, 1928.

This invention relates to actions of pianofortes, and particularly to the mounting of same, iii the instruments.

lt is the usual practice in assembling and fitting an action in a. pianoforte, to mount the hainmeis and the dampers on a rail known as the action rail, the latter being secured at its ends between brackets detachably secured to the frame of the instrument.

Owing to the close spacing of the hammers and the dampers, side by side on the action rail, it is a difi'icult matter to adjust and repair the various parts of the action mechanism when necessary without removingthe action as a whole from the pianoforte, and even after removal of the action as aforesaid access to various parts of same is still difficult, and sometimes entails the taking to pieces of the action.

lt is found that the dampers frequently require adjustment by tightening the screws which secure the damper holdingbrackets to the action rail, and the object of the invention is to provide an improvement which will enable access to be readily gained to the damper mountings, said improvement at the same time facilitating access to the other parts of the action, without necessitating the removal of the latter from the instrument.

The improvement consists in forming the action rail of a. pianoforte with a. portion detachably secured to said rail the detachable portion carrying the dampers.

y removing the detachable portion carrying the dampers from the action rail, each and every damper can be easily got at for adjustment and/or repair as required, while the reiiioval of the dampers exposes the remainder of the action, so that the various parts thereof are enabled to be got at with comparative ease.

In order however that the invention may he more cleai'ly understood it will be further described in conjunction with the accompanying drawing wherein,

Figure 1 is a part cross sectional elevation of a pianoforte fitted with the improvements,

Figure 2 is a part perspective view of the action rail, showing dampers mounted on the detachable or securing said portion thereof, and means detachable portion to the action rail, while Figure 3 is a sectional detail of the showing in Figure 2.

In the drawing 1 represents the action rail of a. pianoforte en ds to brackets ably secured to said rail being secured at its 2, which are in turn detachthe franie 2a of the instruto operate on st rings or note units 9 through the action 5 from the keys 6 mounted on aV key frame 7 known wav.

and key bed 8, in any suitable Insteadlof the dampers 4 being mounted directly on the action rail on a portion 10 to the rail 1.

l, they are mounted which is detachably secured The detachable portion 10 is recessed longitudinally in the prises a length rail 1 and preferably coinof light angle iron, to the upper surface of which the brackets 11 in which the dampers by screws 12. while projecting from the 4 are pivoted, are secured screw threaded studs 13 vertical surface of the action rail, have passed thereon holes in the iron l0 and take nuts 15 on their outer ends, in order to detachably secure the portion 10 to the rail 1.

Upon removing the nuts 15 from the studs a are enabled to be removed from and clear of the, action rail 1 and the remainder of the action 5. This not only enables each and every damper 4 to be easily Igot at where required, but exposes the remainder of the action so that the got at, and by parts thereof are more easily disconnecting the check tapes 16 the hammers 3 away from the rail can be thrown right over 1, to `ive even more complet-e access to the working and wearing parts of the action 5. 10 on the rail 1 Upon replacing the portion the damper tails 4a re-engage the damper spoons 17 in readiness for operakion.

Figure 2, each s ection or length 18 being provided With its own means of fastening to the rail 1, such as Ystuds 13 and Winged nuts 15 so that in all cases it is not necessary to remove all` of the dampers 41 in order to get at a particular damper, or a particular part of the action; The dividing line between the sections`18, 18 is shown at 19.

lVhat I do claim and Letters Patent of vthe Americais A Y 1. In a pianoforte, an action carrying rail recessed longitudinally to accommodate a United States of kseparate portion of angle iron cross Section carrying the dampers -of said action and means for detaehably securing said separate A portion to said rail.

2. In a pianoforte,

" recessed longitudinally to Vaccommodate a separate portion of angle iron cross section; dampers having cured tosaid separate portion; screwed studs projecting fromV said rail to pass through openings in said separate portion and receive nuts toV detaohably secure the separate portion to said rail; In testimonyy name to this specication.

, ERNEST EDWIN ADAMS.

vdesire to. obtain by an action carrying rail,`

their mounting brackets se-V Whereof I have signed my 

